Shelf and tray combination for a refrigerator



FIG. 1 is a left-side, front, top perspective view of a shelf and tray combination for a refrigerator, showing my new design;

FIG. 2 is a right-side, front, top perspective view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a front elevational view thereof. 

The ornamental design for a shelf and tray combination for a refrigerator, as shown and described. 